Notebook[List[Cell[BoxData[List[FormBox[RowBox[List[SubscriptBox[RowBox[List["(", RowBox[List["a", "*", "h"]], ")"]], "n"], "=", RowBox[List[UnderoverscriptBox["\[Sum]", "t", " "], " ", RowBox[List[SubscriptBox["a", "t"], SubscriptBox["h", RowBox[List["n", "-", "t"]]]]]]]]], TraditionalForm], FormBox[RowBox[List[SubscriptBox[RowBox[List[StyleBox["and", Rule[FontSlant, "Plain"]], "\n", "(", RowBox[List["a", "*", "g"]], ")"]], "n"], "=", RowBox[List[UnderoverscriptBox["\[Sum]", "t", " "], " ", RowBox[List[SubscriptBox["a", "t"], SubscriptBox["g", RowBox[List["n", "-", "t"]]]]]]]]], TraditionalForm]]], "Input"]]]